Geared-power-developing unit



H. T. HERR.

GEARED POWER DEVELOPING UNIT.

APPLICATION FILED SEPT. 8, 1917.

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UNITED STATES PATENT OFFICE.

HERBERT T. HERB, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING 00., A CORPORATION PENNSYLVANIA.

GEARED-POWER-DEVELOPING UNIT.

Specification otLetters Patent. Patented July 19, 1921.

Application filed September 8, 1917. Serial No. 190,389.

To all whom it may canoe rm:

Be it known that I, HERBERT T. HERR, a citizen of the United States, and a' resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania have made a new and useful Invention in Geared-Power-Developing Units, of which the following is a specification.

This invention relates to turbine apparatus and has for an object to produce an improved geared power developing unit which 1s of simpler and more rigid construction and is more compact than similar units now in use and known to me.

A further object is to produce a self-contained unit including a compound turbine and a reduction gearing in which both sections of the compound turbine are adapted to deliver power to the driving pinion of the reduction gearing.

These and other objects, which will be made apparent throughout the further description of my invention, are attained by means of apparatus embodying the features herein described and illustrated in the drawings accompanying and forming a part hereof.

In the drawings: Figure 1 is a sectional plan view of a geared unit embodying my a cross compound turbine in which the rotor elements of both turbine sections are directly secured to a ships structure or other founda-' tio by a single seating. v The reduction gearing includes a driving gear or pinion 6 and a driven gear 7, which meshes with the pinion 6. As illustrated, the gear and pinion are of the usual construction, each being provided with two sets of oppositely inclined gear teeth and each being 'journaled in bearings formed or mounted in a casing 8. Both ends of the mounting shaft of the pinion 6 are overhung and the rotor element 3 of the initial section 3 is mounted on one end of the shaft, whereas the rotor element 4" of the low pressure section 4 is mounted on the other end of the shaft. A housing 3 incloses the rotor 3 of the turbine section 3 and is mounted on the gearing casin 8. A housing 4 forms a part of the section 4 and is also mounted on the gearing 'casing 8.

The initial section 3 may be of any suitable type but is preferably of the reentry type including asingle row of moving blades. As shown, the rotor 3 is equipped with radially extending blades 9, which are shrouded and which receive steam from one or more steam nozzles 10. The nozzles 10 communicate with a steam chest 11 which receives steam through an inlet port 12 provided in the housing 3 The nozzles 10 are preferably divergent nozzles and capable of expanding the steam traversing them to the ressure at which it is discharged from the initial section. The steam issuing from the nozzles 10 traverses the blades 9 and is received by a redirecting passage 13, which redirects and redelivers it to the blades 9 in the usual manner. The number of redirecting passages employed will depend somewhat on the conditions encountered but, generally speaking, any number may be employed. The steam finally discharged from the blades 9 passes through an exhaust port 14, with which the casing 3 is provided, and is delivered by means of a pipe or passage 15 to the inlet port of the low pressure section 4. The inlet port of the section 4 communicates with an annular steam chest 16 whichdelivers steam to a series of nozzles 17. The nozzles 17 are preferably adapted to expand the steam received by them to exhaust or condenser pressure, and the nozzles are preferably arranged in an annular series extending around the entire periphery of the wheel 4. As illustrated, the nozzles 17 deliver the steam so expanded by them'to ing section as a part of the low pressure section 4. In Fig. 2, I have shown the form of delivered to these elements by means of one or more nozzles which communicate with the steam chest 20 formed in the casing 4 and receiving steam through the inlet 4. Steam issuing from the reversing section and also from the ahead blades of the low pressure section 4 is discharged through an exhaust port 21 which, as illustrated, is of substantially the same cross sectional area as the casing 4". Either or both sections may be provided with a reversing section, and

the two reversing sections may be compounded as desired.

A packing 25 is provided between the housing 3 and the shaft on which the pinion 6 and rotor 3 are mounted. A similar packing is provided between the casing 4" and the other end of the shaft, and an open pocket 26 is formed between each housing and the casing 8, to permit easy removal of oil and water leakage from the bearings and packings respectively. The housing 3 is shown divided at 26 on a plane passing through the axis of the pinion shaft. The casing 8 and housing 4 are similarly divided. and consequently a portion of the com bined casing may be removed for the purpose of removing the inion with the rotor element's attached. 'I his may be accomplished without removingv the entire housings from the casing andwithout removing all of the steam connections from the turbine sections. I

While I have described and illustrated but one embodiment ofmy invention, it will be apparent to those skilled in the art that various modifications, changes, additions and omissions may be made in the apparatus illustrated without departing from the spirit and scope of the invention, as set forth by the appended claims.

What I claim is:

1. In combination in a geared turbine unit, a drivin gear, a driven ear meshing therewith, an inclosing casing or said gears in which said gears are mounted, a turbine housing mounted on each sidecof said casing, and a turbine rotor inclosed in each hous ing, each rotor being mounted on the shaft of the drivin gear.

2. In comEi unit, a driving gear, a driven gear, a casing in which said gears are mounted, a turbine rotor mounted on each overhanging end of the shaft of the driving gear, and a separate housing for each .rotor mounted on said casing.

3. n combination in a geared turbine unit, a driving gear, a driven gear meshing therewith, a casing in which. said gearsare journaled, in combination with two turbine sections, each comprising a rotor element nation in a geared turbine mounted on the shaft of the driving gear,

and a housing mounted on the casing, and ahead and reversing blades mounted on one of said elements.

4. In combination, a high pressure turbine section, a low pressure turbine section axially alined therewith, reduction gearing interposed between said sections for transmitting the power developed by both of said sections and axially alined therewith, a shaft common to" the gearing and both turbine sections, and casin elements bolted together to form a unit Ior inclosing said gearing, said shaft and both turbine sections.

5. A marine turbine apparatus comprising a-driving gear, a driven ge r meshing therewith, a turbin rotor element mounted on an overhanging end of the shaft of the driving gear, a second rotor element mounted on the opposite overhanging end of said shaft, ahead and reversing blading mounted on one of said sections, and a casing for each of said rotor elements and said gearing whereby said apparatus may be secured to the ships structure by a single seating.

In testimony whereof, I have hereunto subscribed my name this 6th day of September, 1917.

HERBERT T. HERR.

Witness C. W. MOGHEE. 

